A friend asks you to check on their 85-year-old grandmother…

A friend asks you to check on their 85-year-old grandmother who resides in a nursing home. Your friend tells you that she rarely gets outside, eats hardly any dairy products, and has aching bones. It is likely that their grandmother has a specific vitamin deficiency. Synthesis of the vitamin in question is dependent on ultraviolet radiation. The actual step in the activation of this vitamin occurs in what tissues?

A female tennis player is suffering pain in the outer part o…

A female tennis player is suffering pain in the outer part of her elbow.  The symptoms have been present for several weeks and include tenderness of the lateral aspect of her elbow with palpation, and pain with wrist extension when her elbow is fully extended. He symptoms are most suggestive of which disorder?